Pitman connection.



PATENTED AUG. l5 1905.

A. GRIBVES. PITMAN CONNECTION.

APPLICATION I'ILED P113. 18. 1906.

mam am UNITED STATES PATENT OFFICE.

ALBERT GRIEV ES, OF SPRINGFIELD, OHIO, ASSIGNOR TO INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

P|T|v|AN CONNECTION.

Specification of Letters Patent.

Patented Aug- 15, 1905.

Application filed February 18,1905. Serial No. 246,357.

To all whom it may concern:

Be it known that I, ALBERT GRIEvEs, a citizen of the United States,residing at Springfield, in the county of Clark and State of Ohio,haveinvented certain new and useful Im provementsin Pitman Connections,of which the following is a specification, reference being had to theaccompanying drawings, forminga part the longitudinal axis of theconnection between I the pitman and said driven member and also a hingemovement about the axis of said connection, the object of the inventionbeing to improve the connecting-joint between the two parts by providingmeans for automatically preventing any loosening of the parts due towear in usage, and also to provide means whereby the two parts may bereadily connected or disconnected without the use of tools.

I secure the above objects by the mechanism shown by the drawings anddescribed in the specification accompanying this application, in WhichFigure 1 is a plan view of the device; Fig. 2, a rear side elevation ofFig. 1; and Fig. 3, a cross-section on line A B of Fig. 1, like numeralsrepresenting like parts throughout the various figures.

4 represents a form of knife-head attachment for the cutting apparatusof mowingmachines provided with the usual side wings 5 and 6 and thetang portion 7 to receive the knife-back in a well-known way. The head 4is provided with a cup-shaped bearing 8, and 9 is a concavo-convexmember integral with the pitman 10 and adapted to be received by themember 8. A latch-piece 11 has one end pivoted to the pitman 10, and itsopposite end is provided with a concave bearing portion 12, adapted tofit upon the rear outside surface of the bearing 8. The portion 12 isprovided with a slot 13, concentric with the pivotal connection of theparts 10 and 11. An opening 1 1 is formed in the rear wall of the member9, adapted to receive a bolt 15, the head of which bears against theouter surface of the part 12 of the latch-piece 11, as shown in Fig. 2.The bolt is provided with a nut 16, and a coiled spring 17 surrounds itbetween the nut and the inner concave wall of the bearing-piece 9 andoperates to yieldingly hold the parts in contact. An opening 18 isprovided in the wall of the part 8 that is large enough to allow thehead of the bolt 15 to pass through it for the purpose of disengagingthe parts when the latch 11 is swung about its pivot, as shown by dottedlines in Fig. 2.

The device operates as follows: The part 9 I is free to move-to alimited extent in the concave bearing 8 about an imaginary axistransverse to the longitudinal pivotal axis of the connecting-bolt andis also movable about said pivotal connection as an axis. The bolt,

in combination with the spring, yieldingly holds the parts in contact,and any wear of the contacting parts is automatically compensated for bysuch means. To disconnect the parts, the bolt is pressed longitudinallyin the direction of its head portion against the action of the springsuflicient to allow the latch-piece to be moved about its pivot andcarry its cup portion away from the part 8, when the head of the boltwill pass through the opening 18, thereby effecting the disengagement ofthe parts.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a pitman connection, the combination of a two-part joint, aspring-pressed bolt opv erative to hold its members yieldingly incontact, and an intervening slotted latch-piece adapted, when movedlaterally relative to the longitudinal axis of the bolt, to release saidbolt from one of said parts.

2. In a pitman connection, the combination of a two-part joint, aspring-pressed bolt operative to hold its members yieldingly in contact,and an intervening latch-piece pivotally connected with one of the partsand having a slot concentric with said pivotal connection and embracingthe body of the bolt, said latch-piece being adapted to release saidbolt from one of said parts when moved about its pivotal connection.

3. In a pitman connection, the combination of two concavo-convex parts,a spring-pressed bolt operative to yieldingly hold said parts incontact, and an intervening concave slotted latch-piece embracing thebody of the bolt and adapted, when moved laterally relative to thelongitudinal axis of said bolt, to release said bolt from one of saidparts.

4. In a pitman connection, the combination of two concavo-convexmembers, a springpressed bolt operative to yieldingly hold said membersin contact, and an intervening pivoted latch-piece, said latch-piecebeing adapted to release said bolt from one of said members when movedabout its pivotal connection.

5. In a pitman connection, the combination of two concavo-convexmembers, a springpressed bolt operative to yieldingly hold said membersin contact, and an intervening pivoted latch piece embracing said bolt,said latch-piece being adapted to release said bolt from one of saidmembers when moved about its pivotal connection.

6. In a pitman connection, the combination of two concavo-convexmembers, a springpressed bolt operative to yieldingly hold said membersin contact, and an intervening pivoted latch-piece, said latch-piecehaving a slot concentric with its pivot embracing said bolt and adaptedto release it from one of said members when moved about its pivotalconnection.

7 In a pitman connection, the combination of two concavo-convex parts, aspring-pressed bolt operative to yieldingly hold said parts in contact,and an intervening concave slotted latch-piece embracing the body of thebolt and pivoted to one of said parts, said latchpiece being adapted torelease said bolt from one of said parts when moved about its pivotalconnection.

8. In a pitman connection, the combination of two concavo-convex parts,one of said parts forming part of the pitman and the other a part of theconnected member, a spiral spring seated within the concave side of onepart, and a concave slotted latch-piece adapted to fit upon the convexside of the other part, a bolt passing within the coiled spring andthrough central openings in each of said parts, and having anadjusting-nut bearing against the spring and a head upon its oppositeend hearing against the concave latch-piece, the said head being adaptedto pass through the opening in the adjacent part when the latch-piece isremoved.

9. In a pitman connection, the combination of two concavo-convex parts,one of said parts being integral with the pit-man and the other forminga part of the connected member, a spiral spring seated within theconcave side of one of said parts, a concave latch-piece adapted to fitupon the convex side of the other part, and pivoted upon one of saidparts and having a slot concentric With said pivot, a bolt passingwithin the coiled spring and through central openings in each of saidparts, and having an adjusting-nut bearing against the spring and a headupon its opposite end bearing against the concave latch-piece, the saidhead being adapted to pass through the opening in the adjacent part whenthe concave latch-piece is removed.

In Witness whereof I hereto aflix my signature in presence of twoWitnesses.

AL BERT GRIEVES.

Witnesses:

CHAS. A. PHILLIPS, FRANK (J. MILLER.

